Decent trails close to Port Huron

Hey everyone,
Canadian here from Sarnia, anything this side of the border is pretty boring unless you venture at least 1 hr away, just wondering what there is on the US side of the border near Port Huron within that distance (or further, always up for exploring).

I've seen Ruby Campground mentioned and it looks like they open late April, is there anything else in the area? Planning on doing Holdridge Lakes as well sometime soon as it looks pretty fun, anywhere else worth checking out?